Hypersensitivity vasculities is sometimes called leukocytoclastic vasculitis. Its symptoms are similar to Henoch-Schönlein purpura. However, hypersensitivity vasculitis affects persons who are older. It usually isn't accompanied by the abdominal pain and digestive disorders that occur with Henoch-Schönlein purpura.
If a person has at least three of the following symptoms, they are diagnosed as having the condition:
- Being older than 16 when the symptoms appear
- Having taken medications before the symptoms appeared
- A slightly elevated, purple-red rash over one or more areas of skin. The rash doesn't whiten when pressed.
- Flat and raised lesions of different sizes over one or more areas of skin
- Changes in the cells of the small blood vessels that can be seen through a microscope
A doctor will do a physical examination and ask about symptoms. He or she will rule out Henoch-Schönlein purpura as a cause of the symptoms.
There is no specific treatment for this disorder. Most cases disappear without treatment. If symptoms persist, therapy with corticosteroids such as prednisone is usually tried.